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Diffstat (limited to 'branches/sca-java-2.0-M4/modules/implementation-java/src/main/java/org/apache/tuscany/sca/implementation/java/introspect/JavaClassVisitor.java')
-rw-r--r-- | branches/sca-java-2.0-M4/modules/implementation-java/src/main/java/org/apache/tuscany/sca/implementation/java/introspect/JavaClassVisitor.java | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/branches/sca-java-2.0-M4/modules/implementation-java/src/main/java/org/apache/tuscany/sca/implementation/java/introspect/JavaClassVisitor.java b/branches/sca-java-2.0-M4/modules/implementation-java/src/main/java/org/apache/tuscany/sca/implementation/java/introspect/JavaClassVisitor.java new file mode 100644 index 0000000000..4b0f5bea55 --- /dev/null +++ b/branches/sca-java-2.0-M4/modules/implementation-java/src/main/java/org/apache/tuscany/sca/implementation/java/introspect/JavaClassVisitor.java @@ -0,0 +1,126 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.tuscany.sca.implementation.java.introspect; + +import java.lang.reflect.Constructor; +import java.lang.reflect.Field; +import java.lang.reflect.Method; + +import org.apache.tuscany.sca.implementation.java.IntrospectionException; +import org.apache.tuscany.sca.implementation.java.JavaImplementation; +import org.apache.tuscany.sca.implementation.java.JavaParameterImpl; + +/** + * Implementations process class-level metadata, typically parsing annotations + * and updating the corresponding <code>ComponentType</code>. A processor + * may, for example, create a Property which is responsible for injecting a + * complex type on a component implementation instance when it is instantiated. + * <p/> Processors will receive callbacks as the implementation class is walked + * while evaluating an assembly. It is the responsibility of the parser to + * determine whether to perform an action during the callback. + * + * @version $Rev$ $Date$ + */ +public interface JavaClassVisitor { + + /** + * A callback received when the component implementation class is first + * loaded + * + * @param clazz the component implementation class + * @param type the incomplete component type associated with the + * implementation class + * @throws IntrospectionException if an error is encountered while processing + * metadata + */ + <T> void visitClass(Class<T> clazz, JavaImplementation type) throws IntrospectionException; + + /** + * A callback received as the component implementation class hierarchy is + * evaluated + * + * @param clazz the superclass in the component implmentation's class + * hierarchy + * @param type the incomplete component type associated with the + * implementation class + * @throws IntrospectionException if an error is encountered while processing + * metadata + */ + <T> void visitSuperClass(Class<T> clazz, JavaImplementation type) throws IntrospectionException; + + /** + * A callback received as the component implementation's public and + * protected methods are evaluated + * + * @param method the current public or protected method being evaluated + * @param type the incomplete component type associated with the + * implementation class + * @throws IntrospectionException if an error is encountered while processing + * metadata + */ + void visitMethod(Method method, JavaImplementation type) throws IntrospectionException; + + /** + * A callback received as the component implementation's constructor used + * for instantiation by the runtime is evaluated. If an implementation + * contains more than one constructor, the constructor passed to the + * callback will be chosen according to the algorithm described in the SCA + * Java Client and Implementation Model Specification. + * + * @param constructor the constructor used for instantiating component + * implementation instances + * @param type the incomplete component type associated with the + * implementation class + * @throws IntrospectionException if an error is encountered while processing + * metadata + */ + <T> void visitConstructor(Constructor<T> constructor, JavaImplementation type) throws IntrospectionException; + + /** + * @param parameter + * @param type + * @throws IntrospectionException + */ + void visitConstructorParameter(JavaParameterImpl parameter, JavaImplementation type) throws IntrospectionException; + + /** + * A callback received as the component implementation's public and + * protected fields are evaluated + * + * @param field the current public or protected field being evaluated + * @param type the incomplete component type associated with the + * implementation class + * @throws IntrospectionException if an error is encountered while processing + * metadata + */ + void visitField(Field field, JavaImplementation type) throws IntrospectionException; + + /** + * The final callback received when all other callbacks during evaluation of + * the component implementation have been issued + * + * @param clazz the component implementation class + * @param type the incomplete component type associated with the + * implementation class + * @throws IntrospectionException if an error is encountered while processing + * metadata + */ + <T> void visitEnd(Class<T> clazz, JavaImplementation type) throws IntrospectionException; + +} |